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满足下列之一不是树

Posted by y05yxg at 2007-05-13 17:35:24 on Problem 1308
In Reply To:需要讨论的情况~ Posted by:piratex at 2007-05-03 21:48:36
边树!=点数-1&&点数!=0
入度=0的顶点个数>1
某个顶点的入度>1

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